<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>圆柱体</title>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/gsap/3.9.1/gsap.min.js"></script>
    <style>
        * {
            border: 0;
            box-sizing: border-box;
            margin: 0;
            padding: 0
        }

        :root {
            --hue: 223;
            --bg: hsl(var(--hue), 10%, 90%);
            --fg: hsl(var(--hue), 10%, 10%);
            --trans-dur: 0.4s;
            font-size: calc(40px + (60 - 40) * (100vw - 320px) / (2560 - 320))
        }

        body, input {
            color: var(--fg);
            font: 1em/1.5 Helvetica, sans-serif
        }

        body {
            background-color: var(--bg);
            display: flex;
            height: 100vh;
            transition: background-color var(--trans-dur), color var(--trans-dur)
        }

        .switch, .switch__input, .switch__handle-sides, .switch__handle-side, .switch__handle-labels, .switch__handle-label, .switch__handle-texture {
            display: block
        }

        .switch, .switch__input {
            cursor: pointer;
            -webkit-tap-highlight-color: transparent
        }

        .switch {
            margin: auto;
            position: relative;
            width: 3em;
            height: 3em
        }

        .switch__input {
            background-color: hsl(var(--hue), 10%, 95%);
            border-radius: 0.25em;
            box-shadow: 0.125em 0.125em 0.125em hsl(0, 0%, 100%) inset, -0.125em -0.125em 0.125em hsl(var(--hue), 10%, 85%) inset, 0.125em 0.125em 0.375em hsl(var(--hue), 10%, 70%);
            outline: transparent;
            position: relative;
            width: 100%;
            height: 100%;
            transition: background-color var(--trans-dur), box-shadow var(--trans-dur);
            -webkit-appearance: none;
            appearance: none
        }

        .switch__input:before {
            border-radius: inherit;
            box-shadow: 0 0 0 max(0.125em, 1px) hsla(var(--hue), 90%, 50%, 0);
            content: "";
            display: block;
            position: absolute;
            inset: 0;
            transition: box-shadow 0.15s linear
        }

        .switch__input:focus-visible:before {
            box-shadow: 0 0 0 max(0.125em, 1px) hsla(var(--hue), 90%, 50%, 1)
        }

        .switch__handle, .switch__handle-sides, .switch__handle-side, .switch__handle-labels, .switch__handle-label {
            position: absolute
        }

        .switch__handle, .switch__handle-label {
            transition: transform var(--trans-dur) cubic-bezier(0.65, 0, 0.36, 1.6)
        }

        .switch__handle, .switch__handle-sides, .switch__handle-texture {
            border-radius: 0.125em
        }

        .switch__handle {
            box-shadow: 0.25em 0.25em 0.25em hsla(var(--hue), 10%, 10%, 0.4);
            top: 10%;
            left: 10%;
            width: 40%;
            height: 80%
        }

        .switch__handle-sides, .switch__handle-labels, .switch__handle-texture {
            width: 100%;
            height: 100%
        }

        .switch__handle-sides, .switch__handle-side {
            background-color: hsl(var(--hue), 10%, 85%);
            transition: background-color var(--trans-dur), transform var(--trans-dur) cubic-bezier(0.65, 0, 0.36, 1.6)
        }

        .switch__handle-sides {
            --side-on: hsl(123, 90%, 40%);
            background-image: linear-gradient(90deg, transparent 50%, var(--side-on) 50%);
            overflow: hidden
        }

        .switch__handle-side {
            background-image: linear-gradient(90deg, var(--side-on) 50%, transparent 50%);
            transform: translateX(-50%);
            width: 200%;
            height: 100%
        }

        .switch__handle-labels {
            transform-style: preserve-3d;
            -webkit-user-select: none;
            -moz-user-select: none;
            user-select: none
        }

        .switch__handle-label {
            backface-visibility: hidden;
            font-size: 0.6em;
            text-shadow: 0 0 0.125em hsla(var(--hue), 10%, 10%, 0.3);
            line-height: 1;
            top: 50%;
            left: 50%;
            text-align: center;
            text-transform: uppercase;
            transform: translate(-50%, -50%) rotateZ(90deg) rotateX(0) translateZ(0.55rem)
        }

        .switch__handle-label + .switch__handle-label {
            color: hsl(0, 0%, 100%);
            text-shadow: 0 0 0.125em hsla(0, 0%, 100%, 0.3);
            transform: translate(-50%, -50%) rotateZ(90deg) rotateX(180deg) translateZ(0.55rem)
        }

        .switch__handle-texture {
            background-image: linear-gradient(
                    90deg, hsla(0, 0%, 100%, 0), hsla(0, 0%, 100%, 0.3) 20%, hsla(0, 0%, 100%, 0) 40%, hsla(0, 0%, 0%, 0) 50%, hsla(0, 0%, 0%, 0.4)
            );
            box-shadow: 0 0.0625em 0.0625em hsla(0, 0%, 100%, 0.3) inset, 0 -0.0625em 0.0625em hsla(0, 0%, 0%, 0.3) inset;
            transform: translateZ(0)
        }

        .switch__input:checked ~ .switch__handle {
            transform: translateX(100%)
        }

        .switch__input:checked ~ .switch__handle .switch__handle-side {
            transform: translateX(0)
        }

        .switch__input:checked ~ .switch__handle .switch__handle-label {
            transform: translate(-50%, -50%) rotateZ(90deg) rotateX(180deg) translateZ(0.55rem)
        }

        .switch__input:checked ~ .switch__handle .switch__handle-label + .switch__handle-label {
            transform: translate(-50%, -50%) rotateZ(90deg) rotateX(360deg) translateZ(0.55rem)
        }

        .switch__label {
            overflow: hidden;
            position: absolute;
            width: 1px;
            height: 1px
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --bg: hsl(var(--hue), 10%, 30%);
                --fg: hsl(var(--hue), 10%, 90%)
            }

            .switch__handle-sides, .switch__handle-side {
                background-color: hsl(var(--hue), 10%, 45%)
            }

            .switch__handle-label {
                text-shadow: 0 0 0.125em hsla(var(--hue), 10%, 90%, 0.3)
            }

            .switch__input {
                background-color: hsl(var(--hue), 10%, 35%);
                box-shadow: 0.125em 0.125em 0.125em hsl(var(--hue), 10%, 50%) inset, -0.125em -0.125em 0.125em hsl(var(--hue), 10%, 25%) inset, 0.125em 0.125em 0.375em hsl(var(--hue), 10%, 20%)
            }
        }
    </style>
</head>

<body>
<label class="switch">
    <input class="switch__input" type="checkbox" role="switch">
    <span class="switch__handle">
      <span class="switch__handle-sides">
        <span class="switch__handle-side"></span>
      </span>
      <span class="switch__handle-labels">
        <span class="switch__handle-label" aria-hidden="true">Off</span>
        <span class="switch__handle-label" aria-hidden="true">On</span>
      </span>
      <span class="switch__handle-texture"></span>
    </span>
    <span class="switch__label">Power</span>
</label>
</body>

</html>